3U7Q
A. vinelandii nitrogenase MoFe protein at atomic resolution
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1M1N | PDB ENTRY 1M1N |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 8 | 291 | 16.5% v/v PEG6000, 0.55 M sodium chloride, 12.5% v/v MPD, 1.5% v/v xylitol, 0.2 M imidazole/malate buffer, pH 8.0, 0.1 mM Zwittergent 3-14, 0.55 mM spermine, VAPOR DIFFUSION, SITTING DROP, temperature 291K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.32 | 46.9 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 81.19 | ¦Á = 90 |
b = 130.696 | ¦Â = 110.67 |
c = 107.224 | ¦Ã = 90 |
Symmetry | |
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Space Group | P 1 21 1 |
Diffraction
Diffraction Experiment | ||||||||||||||
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ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 100 | PIXEL | DECTRIS PILATUS 6M | 2011-03-15 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SLS BEAMLINE X06SA | 0.8 | SLS | X06SA |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Net I Over Average Sigma (I) | Redundancy | Number Reflections (All) | Number Reflections (Observed) | Observed Criterion Sigma (F) | Observed Criterion Sigma (I) | B (Isotropic) From Wilson Plot | ||||||||
1 | 1 | 47.457 | 99.1 | 0.1 | 8.6 | 6.43 | 1122961 | 1112854 | 2 | 2 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
1 | 1 | 1.09 | 98.3 | 0.687 | 1.5 | 5.55 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | |||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | PDB ENTRY 1M1N | 1 | 47.457 | 1112854 | 1056183 | 55903 | 99.16 | 0.12932 | 0.12844 | 0.14603 | RANDOM | 8.079 |
Temperature Factor Modeling | ||||||
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Anisotropic B[1][1] | Anisotropic B[1][2] | Anisotropic B[1][3] | Anisotropic B[2][2] | Anisotropic B[2][3] | Anisotropic B[3][3] | |
0.3 | 0.01 | 0.03 | -0.32 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_sphericity_free | 38.432 |
r_dihedral_angle_2_deg | 36.166 |
r_dihedral_angle_4_deg | 20.094 |
r_dihedral_angle_3_deg | 11.636 |
r_sphericity_bonded | 8.834 |
r_dihedral_angle_1_deg | 6.067 |
r_rigid_bond_restr | 2.496 |
r_angle_other_deg | 1.556 |
r_angle_refined_deg | 1.541 |
r_chiral_restr | 0.099 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 15928 |
Nucleic Acid Atoms | |
Solvent Atoms | 2602 |
Heterogen Atoms | 168 |
Software
Software | |
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Software Name | Purpose |
MOLREP | phasing |
REFMAC | refinement |
HKL-2000 | data reduction |
HKL-2000 | data scaling |